Exercise bike



FIG. 1 is a front, top perspective view of an exercise bike, showing my new design;

FIG. 2 is a rear, bottom perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is an enlarged view of detail “9” identified in FIG. 1 ;

FIG. 10 is an enlarged view of detail “10” identified in FIG. 1 ;

FIG. 11 is an enlarged view of detail “11” identified in FIG. 2 ;

FIG. 12 is an enlarged view of detail “12” identified in FIG. 2 ;

FIG. 13 is an enlarged view of detail “13” identified in FIG. 5 ; and,

FIG. 14 is an enlarged view of detail “14” identified in FIG. 7 .

The dashed lines in the figures illustrate portions of the exercise bike that form no part of the claimed design. The dash dot dash lines in FIGS. 1, 2, 5, 7, 9, 10, 11, 12, 13 and 14 are for the purpose of illustrating the enlarged view indicators and form no part of the claimed design. 

CLAIM The ornamental design for an exercise bike, as shown and described. 